A circuit is a path along which electricity can travel. When you connect the wires from the lights to the wires on the snap cap, you’ve made a circuit. When all parts of the circuit are connected, electricity flows from the battery to the lights and back to the battery, making your glow stick glow!

Make jewelry. Wearable light? Yes! Use different-length light strings for different pieces.

Dance in the Dark. For a very dramatic effect, take your glow stick into a dark space.

Make a longer glow stick. Use two 9-volt batteries in series to power up even more bulbs for a super-long glow stick. To wire in series, connect the red wire of one snap cap to the black wire of a second snap cap. Then connect the light string to the two open wires.